I kinda think they are fine at TE if they want the position to be more about blocking than receiving. Pharoh Brown isn't awful. I'm really of the belief that Jonnu Smith isn't a big loss at all. Fantasy value>>>>>NFL value, his targets will be much more valuable going to Achane, Hill, and Waddle.
I think the Ravens would be extremely unlikely to deal Andrews, who is still a top-5 NFL TE in my opinion, even if he may not be in fantasy. Kmet or Mayer, I mean those guys are probably better all-around players than Jonnu was, but why would either team give them up for anything less than a 3rd round pick?
I think if Miami adds a TE, its more likely to be off the FA scrap heap. Names like Gerald Everett, Marcedes Lewis (6th OL), or Jordan Akins feel more in line.
ETA: I don't think TE is a huge part of Mike McDaniel's offense. Before Jonnu's 111 targets last year, the previous 2 guys had 52 (Gesicki, who they let go because of blocking issues) and 43 (Smythe) Jaylen Waddle had 83 targets last year, I think they want that number to be closer to 130. Tyreek had 123, I think they want that number to be closer to 160.